Revert "Revert "SkTypes: extract SkTo""

This reverts commit fdcfb8b7c23fbf18f872d2c31d27978235033876.

> Original change's description:
> > SkTypes: extract SkTo
> >
> > Change-Id: I8de790d5013db2105ad885fa2683303d7c250b09
> > Reviewed-on: https://skia-review.googlesource.com/133620
> > Reviewed-by: Mike Klein <mtklein@google.com>

Change-Id: Ida74fbc5c21248a724a5edbf9fae18a33bcb23aa
Reviewed-on: https://skia-review.googlesource.com/134506
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/tests/PDFPrimitivesTest.cpp b/tests/PDFPrimitivesTest.cpp
index d25adea..f23c8e3 100644
--- a/tests/PDFPrimitivesTest.cpp
+++ b/tests/PDFPrimitivesTest.cpp
@@ -14,8 +14,8 @@
 #include "SkCanvas.h"
 #include "SkClusterator.h"
 #include "SkData.h"
-#include "SkDocument.h"
 #include "SkDeflate.h"
+#include "SkDocument.h"
 #include "SkImageEncoder.h"
 #include "SkImageFilterPriv.h"
 #include "SkMakeUnique.h"
@@ -29,6 +29,7 @@
 #include "SkScalar.h"
 #include "SkSpecialImage.h"
 #include "SkStream.h"
+#include "SkTo.h"
 #include "SkTypes.h"
 #include "sk_tool_utils.h"